We found this sensitive high input impedance voltage amplifier in the November 1970 Radio Electronics magazine. The circuit is powered by 18 V power source.
We have in the figure a traditional amplifier configuration with operational amplifier. The source...
This circuit was found in a 1977 Radio Shack documentation. The circuit is TTL, which must be...
This circuit is suitable for modulating small FM transmitters for eavesdropping or espionage. The...